Modular cis‐regulatory regions of the yellow gene in Bombyx mori and Drosophila melanogaster. (A) The cis‐regulatory modules of the yellow gene in B. mori larvae. The three cis‐regulatory elements (CREs) are illustrated with the same colours as those in Fig. 2. (B) The cis‐regulatory modules of the yellow gene in D. melanogaster. The four CREs are cited from the literature (Martin et al., 1989). The dark blue box represents the adult thoracic cuticle CRE, the orange box marks the location of the adult abdominal cuticle bands CRE, the light green box indicates the larval hair (microseta) and mouthparts CRE and the brown box exhibits the adult sex combs and tarsal claws CRE. The genomic locations are indicated by bp numbers.